| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 16.67 | 197305170_CHA_MIN |
| Jim Palmer | BAL | 8.07 | 197305170_BAL_CLE |
| Gaylord Perry | CLE | 7.27 | 197305170_BAL_CLE |
| Don Sutton | LAN | 5.98 | 197305170_LAN_CIN |
| Mickey Lolich | DET | 2.31 | 197305160_BOS_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wayne Simpson | KCA | -4.58 | 197305170_KCA_TEX |
| Pete Broberg | TEX | -2.75 | 197305160_KCA_TEX |
| Mike Caldwell | SDN | -1.4 | 197305160_SFN_SDN |
| Jerry Reuss | HOU | -1.29 | 197305160_ATL_HOU |
| Johnny Odom | OAK | -1.05 | 197305160_OAK_ANA |
Based on accumulated WAA for this season up to 1973-05-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.14 | Ken Holtzman | 78.7 | OAK |
| +002+ | 3.9 | Wilbur Wood | 100 | CHA |
| +003+ | 3.33 | Tom Seaver | 65.3 | NYN |
| +005+ | 2.98 | Bill Singer | 71.7 | ANA |
| +008+ | 2.6 | Rick Reuschel | 59 | CHN |
| +011+ | 2.53 | Ron Bryant | 68.7 | SFN |
| +012+ | 2.44 | Jim Perry | 62.7 | DET |
| +013+ | 2.25 | Bill Greif | 46 | SDN |
| +014+ | 2.24 | Jim Palmer | 60.7 | BAL |
| +016+ | 2.19 | Jerry Reuss | 66.3 | HOU |
| +018+ | 2.1 | Gaylord Perry | 82.7 | CLE |
| +021+ | 2.04 | Joe Coleman | 68 | DET |
| +020+ | 2.04 | Jerry Koosman | 57.3 | NYN |
| +024+ | 1.93 | Dave McNally | 69.7 | BAL |
| +025+ | 1.9 | Jack Billingham | 68.7 | CIN |
| +026+ | 1.85 | Paul Splittorff | 70.3 | KCA |
| +027+ | 1.84 | Don Sutton | 72 | LAN |
| +032+ | 1.69 | Rudy May | 51 | ANA |
| +040+ | 1.5 | Bill Lee | 50 | BOS |
| +043+ | 1.41 | Nolan Ryan | 73 | ANA |
| +044+ | 1.37 | Mel Stottlemyre | 62.7 | NYA |
| +045+ | 1.32 | Doyle Alexander | 44.3 | BAL |
| XXXXX | 1.24 | Rogelio Moret | 14.7 | BOS |
| XXXXX | 1.23 | Bruce DalCanton | 42.7 | KCA |
| XXXXX | 1.22 | Rollie Fingers | 27.7 | OAK |
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